This part of GB/T 19408 specifies the dimensional requirements for wedge connection devices used to connect and install agricultural trailers, unbalanced trailers and agricultural implements that comply with ISO 5692-1 connection rings. Suitable for ensuring the interchangeability of agricultural trailer mechanical connections. This is only used when the static vertical load does not exceed 30kN.
GB/T 19408.4-2009 Referenced Document
GB/T 1592-2003 Agricultural tractors--Rear-mounted power take-off-types 1,2 and 3
ISO 5692-1:2004 Agricultural vehicles - Mechanical connections on towed vehicles - Part 1: Dimensions for hitch rings
GB/T 19408.4-2009 history
2009GB/T 19408.4-2009 Agricultural vehicles.Mechanical connections between towed and towing vehivles.Part 4:Dimensions of piton-type coupling